(AP) — Barack Obama is inching ever closer to locking up the Democratic presidential nomination despite another resounding loss to Hillary Rodham Clinton, this time in Kentucky.

Clinton beat Obama by 35 percentage points in Kentucky, after trouncing him by 41 percentage points in West Virginia last week, and has won five of the last seven primaries.

Once all the delegates were allocated from Tuesday's contests in Oregon and Kentucky, however, Obama was expected to be within 60 of the magic 2,026 needed to cinch the nomination. With 80 percent of the vote counted, he was winning Oregon by a 58-42 percent margin.

WASHINGTON (AP) — Barack Obama will reach a significant milestone Tuesday as he marches toward the Democratic nomination for president — a majority of pledged delegates at stake in all the primaries and caucuses.

Obama will still be short of the overall number of delegates needed to clinch the nomination, unless he were to suddenly receive an avalanche of endorsements from the party and elected officials known as superdelegates. But the Illinois senator's campaign is touting the delegate milestone as a big step in defeating his rival, Sen. Hillary Rodham Clinton of New York.

GRAND RAPIDS, Mich. (AP) — Democrat John Edwards endorsed former rival Barack Obama on Wednesday, a move designed to help solidify support for the party's likely presidential nominee even as Hillary Rodham Clinton refuses to give up her long-shot candidacy.

Edwards made a surprise appearance with Obama in Grand Rapids, Mich., as the Illinois senator campaigns in a critical general election battleground state.

The endorsement came a day after Clinton defeated Obama by more than 2-to-1 in the West Virginia primary. The loss highlighted Obama's challenge in winning over the "Hillary Democrats" — white, working-class voters who also supported Edwards in significant numbers before he exited the race in late January.

CHARLESTON, W.Va. (AP) — Hillary Rodham Clinton won a large but largely symbolic victory in the West Virginia primary Tuesday over Barack Obama, still the leader and closing in on the Democratic presidential nomination.

The Associated Press made its call based on surveys of voters as they left the polls.

Obama conceded defeat in advance in the state as he looked ahead to the Oregon primary later in the month and the campaign against Republican John McCain.

"This is our chance to build a new majority of Democrats and independents and Republicans who know that four more years of George Bush just won't do," Obama said in Missouri, which looms as a battleground state in the fall.

As the Cornell-operated Arecibo Observatory in Puerto Rico struggles to find financial support after the National Science Foundation slashed its funding, Sen. Hillary Clinton (D-N.Y.) is proposing, in legislation she introduced two weeks ago, that the NSF completely restore the research facility’s grants. But with just a month until the Puerto Rican primary, some Sen. Barack Obama (D-Ill.) supporters are calling the move political posturing.

On April 15, Clinton introduced a bill in the Senate — S.2862 — that directs the NSF to “ensure that the Arecibo Observatory is fully funded.” The bill cites the scientific and research value of the observatory and also calls for the observatory’s collaboration with NASA for the research of near-Earth objects.

On his way to Ithaca yesterday, Robert B. Semple Jr., New York Times associate editor and winner of the Pulitzer Prize, got a call from his wife. She told him that when he was speaking to students at Cornell, he should tell them not to give up on politics.

With recent news of Gov. Eliot Spitzer’s (D-N.Y.) involvement with prostitution, many are losing hope in the way our government works. But Semple, in his lecture to students in Goldwin Smith’s Lewis Auditorium last night, tried to stay optimistic. As one of the editors who puts together editorials for The Times, he gave his perspective on the three remaining presidential candidates and challenges that each of them faces in the coming months.

HOUSTON (AP) — Former President George H.W. Bush endorsed John McCain on Monday, a nod of approval from the Republican political dynasty's patriarch that sends a strong signal to a GOP establishment wary of the Arizona senator.

"No one is better prepared to lead our nation at these trying times than Sen. John McCain," Bush said, standing alongside the Republican nominee-in-waiting in an airport hanger. "His character was forged in the crucible of war. His commitment to America is beyond any doubt. But most importantly, he has the right values and experience to guide our nation forward at this historic moment."

WASHINGTON (AP) — Barack Obama won the Georgia primary Tuesday night, the leading edge of a coast-to-coast struggle with Hillary Rodham Clinton for delegates in the grueling Democratic presidential campaign. Arizona Sen. John McCain challenged his remaining rivals for control of the Republican race.

It was Obama's second straight Southern triumph, and like an earlier victory in South Carolina, was built on a wave of black votes.

The Associated Press made its call based on surveys of voters as they left the polls.

The 87 delegates at stake in Georgia's primary were divided between the two candidates in rough proportion to the votes.